Heat exchanger
CA 2268837 C · Owner: Honda Giken Kogyo Kabushiki Kaisha · Inventors: Tsunoda, Tadashi; Yanai, Hideyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat exchanger which is constructed, such that combustion gas passages (4) for passage of combustion gas and air passages (5) for passages of air are arranged alternately and, the heat exchanger is cut at one end side thereof in an unequal angle configuration to form combustion gas passage inlets (11) and air passage outlets (16), and cut at the other end side thereof in an unequal angle configuration to form combustion gas passage outlets (12) and air passage inlets (15). The combustion gas passage inlets (11) and combustion gas passage outlets (12), through which a combustion gas having a larger volume flow rate passes are, formed on a long side of an angle and the air, passage inlets …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 17, 1997 and granted November 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.